Fluke 8840A Manuals

Manuals and User Guides for Fluke 8840A. We have 2 Fluke 8840A manuals available for free PDF download: Instruction Manual

Fluke 8840A Instruction Manual (181 pages)

Brand: Fluke | Category: Multimeter | Size: 26.39 MB

Multimeter Safety
3
Section Guide
5
Table of Contents
7
List of Tables
13
List of Illustrations
14
Introduction and Specifications
17
Options and Accessories
17
Operating Instructions
25
Installation
25
Installing the Power-Line Fuse
25
Connecting to Line Power
25
Operating Features
26
Power-Up Features
26
Front and Rear Panel Features
26
Line Voltage Selection Setting
26
Display Features
27
Error Messages
27
Overrange Indication
27
Rack-Mount Kits
27
Front Panel Features
28
Rear Panel Features
30
Diagnostic Self-Tests
31
Ranging
31
Triggering
31
Autorange
31
Error Codes
32
Making Measurements
33
Reading Rates and Noise Rejection
33
Automatic Setting Time Delay
33
External Trigger Input
33
Measuring Voltage and Resistance
34
Measuring Current
34
Current Fuse Protection
34
Offset Measurements
34
External Cleaning
35
Remote Programming
37
Capabilities
37
Bus Set-Up Procedure
37
An Overview of Remote Operation
37
A Note about Examples
38
Device-Dependent Command Set
38
Bn (Offset Commands)
38
IEEE-488 Address Selection
38
Remote Operation Block Diagram
39
Cn (Calibration Commands)
40
Dn (Display Commands)
40
Fn (Function Commands)
40
Get Commands
40
Commands Which Correspond to the Front Panel
41
G0 (Get Instrument Configuration)
43
G1 (Get SRQ Mask)
43
G2 (Get Calibration Prompt)
43
Output Data Format
44
G3 (Get User-Defined Message)
45
G4 (Get Calibration Status)
45
G5 (Get IAB Status)
45
G6 (Get YW Status)
45
N (Numeric Entry Command)
46
Put Commands
46
P0 (Put Instrument Configuration)
46
P1 (Put SRQ Mask)
46
Status Data
47
P3 (Put User-Defined Message)
48
Rn (Range Commands)
48
Sn (Reading Rate Commands)
48
Tn (Trigger Mode Commands)
48
Trigger Selection Logic Diagram
49
Z0 (Self-Test Command)
50
? (Single-Trigger Command)
50
Input Syntax
50
Definitions
50
Syntax Rules
51
Device-Dependent Messages
52
Output Data
53
Loading Output Data
53
Types of Output Data
53
Numeric Data and Error Messages
53
Output Priority
54
Service Requests
54
The Serial Poll Register
54
Talk-Only Mode
55
Address Messages
55
Universal Commands
55
Addressed Commands
55
Timing Considerations
56
Immediate Mode Commands
56
Example Programs
56
Immediate-Mode Commands for Various Controllers
56
Using the IBM PC
61
ASCI/IEEE Std 488-1978 Bus Codes
73
Measurement Tutorial
74
DC Voltage Measurement
74
Circuit Loading Error
74
Input Bias Current Error
74
Resistance Measurement
75
2-Wire Ohms
75
Correcting for Test Lead Resistance in 2-Wire Ohms
75
Circuit Loading Error Calculation
75
4-Wire Ohm
76
Applications of the Ohms Functions
76
Measuring Input Bias Current Error
76
Testing Diodes
77
Testing Electrolytic Capacitors
77
A Precision Current Source
78
DC Current Measurement
79
Reducing Thermal Voltages
79
AC Voltage and Current
79
True RMS Measurement
79
AC-Coupled AC Measurements
80
Burden Voltage Error Calculation
80
Waveform Comparison Chart
81
Combined AC and DC Measurements
82
Bandwidth
82
Zero-Input VAC Error
82
Reduction of Zero-Input Error
83
Theory of Operation
84
Overall Functional Description
84
Detailed Circuit Description
84
DC Scaling
84
Overall Functional Block Diagram
85
DC Scaling (VDC and Ma DC)
86
VDC Protection
87
Ma DC Scaling
87
Analog Filter
87
Track/Hold Circuit
87
OHMS Current Source
88
OHMS Protection
88
Track/Hold Amplifier
88
Track/Hold Circuit Configurations
89
Timing Diagram for One A/D Cycle
90
OHMS Functions
91
4-Wire Ohms
91
Precision Voltage Reference
91
A/D Converter
92
Ohms Scaling
93
Timing/Data Control
94
Analog-To-Digital Converter
94
First Remainder-Store Period
95
Precision DAC
95
A/D Amplifier
95
Bootstrap Supplies
95
Keyboard
96
Digital Controller
96
In-Guard Microcomputer
96
Autozero Period
96
Digital Controller Block Diagram
97
Function and Range Control
98
A/D Control and Computation
98
Calibration Correction
98
Keyboard/Display Control
98
Read/Write Timing Diagrams for Internal Bus
99
Power Supply
100
Sample Rates and Reading Rates
100
Guard Crossing Circuit
100
Out-Guard Microcomputer
101
Guard Crossing
101
Bus Interface Circuitry
101
Signal Conditioning
101
Ieee-488 Interface Power Supply
102
TRUE RMS AC (Option -09)
102
VAC Scaling
102
Ma AC Scaling
102
True RMS AC-To-DC Converter
103
Maintenance
106
Performance Test
106
DC Voltage Test
106
Recommended Test Equipment
107
AC Voltage Test
108
Connections for Kelvin-Varley Voltage Divider
108
Resistance Test
109
Low- and MID-Frequency AC Voltage Test
109
High-Frequency AC Voltage Test
110
Calibration
111
Basic Calibration Procedure
111
Calibration Functions
113
A/D Calibration
113
A/D Calibration Test
113
Offset and Gain Calibration
114
Advanced Features and Special Considerations
115
Storing Variable Inputs
115
Calibrating Individual Ranges
115
Verifying Calibration
116
Prompts When Calibrating Individual Ranges
116
Tolerance Check
117
AC Calibration at Other Frequencies
117
Optimizing Use of the 5450A
117
Remote Calibration
118
Commands Used During Remote Calibration
118
Error Numbers Which Are Displayed When Commands Are Not Valid
120
Remote Erasure
120
Disassembly Procedure
121
Example Calibration Program
121
Example A/D Calibration Program
121
Case Removal
122
True RMS AC PCA Removal
122
IEEE-488 Interface PCA Removal
122
Main PCA Removal
122
8840A Disassembly
123
Front Panel Disassembly
127
Reassembly Procedure
127
Internal Fuse Replacement
129
Removing the Display Window
129
External Trigger Polarity Selection
130
Troubleshooting
130
Overall State Table
131
Circuitry Tested by the Analog Self-Tests
133
Self-Test Descriptions
134
Digital Controller Troubleshooting
136
In-Guard Microcomputer System
136
U202 Pin Diagram
137
Waveforms for In-Guard Troubleshooting Mode
138
Display System
139
Analog Control Signals
140
Waveforms for Display Logic
140
Evaluating Static Signals
141
Evaluating Dynamic Signals
141
Keyboard Wiring
141
Analog Control Devices
141
Analog Control Logic States
142
DC Scaling Troubleshooting
143
Track/Hold Troubleshooting
143
Typical Dynamic Control Signals
143
DC Scaling and Track/Hold Supply Voltages
143
Ohms Current Source Troubleshooting
144
Precision Voltage Reference Troubleshooting
144
Typical Output Waveforms for Track/Hold Circuit (TP103)
145
A/D Converter Troubleshooting
146
Output of A/D Amplifier (TP101)
146
Power Supply Troubleshooting
147
Waveforms at U101-24 and U101-25
147
Typical Bus Data Line Waveform
148
Waveforms at TP102 for Several Inputs on 2V DV Range
148
IEEE-488 Interface Troubleshooting
149
Calculating the A/D Reading from TP102 Waveform
149
Power Supply Voltages
149
Diagnostic Program
150
True RMS AC Troubleshooting
151
I/O Port Configurations
151
Isolating a Defective AC Stage
152
Internal Cleaning
153
Guard Crossing Troubleshooting
153
Cleaning Printed Circuit Assemblies
153
AC Signal Tracing
153
Cleaning after Soldering
154
Guard Crossing Test Waveforms
154
List of Replaceable Parts
156
How to Obtain Parts
157
Manual Status Information
157
Newer Instruments
157
Service Centers
157
8840A Digital Multimeter
158
A1 Main PCA
163
Main PCA, DC Scaling and F/R Switch
165
Display PCA
175

Fluke 8840A Instruction Manual (182 pages)

Brand: Fluke | Category: Multimeter | Size: 13.63 MB

Section 1

8
- Introduction and Specifications
  6
- Options and Accessories
  6
  - Table of Contents
    8
- Introduction
  10
Section 2

15
- Operating Instructions
  18
  - Introduction
    18
- Specifications
  18
- The 8840A Digital Multimeter
  18
- External Dimensions
  25
  - Installing the Power-Line Fuse
    26
  - Connecting to Line Power
    26
  - Adjusting the Handle
    26
  - Rack Mounting Kits
    26
  - Operating Features
    27
    
    Front and Rear Panel Features
    27
    
    Power-Up Features
    27
  - Line Voltage Selection Settings
    27
  - Adjusting the Handle
    27
    
    Display Features
    28
    
    Error Messages
    28
    
    Overrange Indication
    28
  - Rack-Mount Kits
    28
    
    Autorange
    32
    
    Continuous Trigger Mode
    32
    
    Diagnostic Self-Tests
    32
    
    External Trigger Mode
    32
    
    Manual Range
    32
    
    Ranging
    32
    
    Triggering
    32
    
    Automatic Settling Time Delay
    34
    
    External Trigger Input (Option -05 Only)
    34
    
    Reading Rates and Noise Rejection
    34
    
    Sample Complete Output (Option -05 Only)
    34
  - Making Measurements
    34
    
    Input Overload Protection Limits
    34
  - Overrange Indication
    34
    
    Measuring Voltage and Resistance
    36
  - External Cleaning
    36
  - Measuring Current
    36
- Remote Programming
  38
  - Introduci'ion
    38
  - Capabilities
    38
  - Bus Set-Up Procedure
    38
  - An Overview of Remote Operation
    39
  - A Note about Examples
    39
  - Device-Dependent Command Set
    39
    
    Bn (Offset Gommands)
    39
  - IEEE-488 Address Seiection
    39
    
    Cn (Calibration Commands)
    41
    
    Fn (Function Commands)
    41
    
    Get Commands
    43
    
    G O (Get Instrument Configuration)
    44
    
    G1 (Get SRQ Mask)
    44
    
    G2 (Get Calibration Prompt)
    44
- Output Data Format
  45
  - G3 (Get User-Defined Message)
    46
  - G4 (Get Calibration Status)
    46
  - G5 (Get IAB Status)
    46
  - G6 (Get YW Status)
    46
  - G7 (Get Error Status)
    46
  - N (Numeric Entry Command)
    47
  - Put Commands
    47
  - P O (Put Instrument Configuration)
    47
  - P2 (Put Calibration Value)
    47
  - Sn (Reading Rate Commands)
    49
  - Tn (Trigger Mode Commands)
    49
  - Wn (Terminator Commands)
    49
- Trigger Selection Logic Diagram
  50
  - ZO (Self-Test Command)
    51
    
    (Single-Trigger Command)
    51
  - Input Syntax
    51
    
    Definitions
    51
    
    Input Processing
    51
    
    Syntax Rules
    52
- Interpretation of Messages
  53
  - Output Data
    54
    
    Error Messages
    54
    
    Loading Output Data
    54
    
    Measurement Data
    54
    
    Numeric Data and Error Messages
    54
    
    Overrange Indication
    54
    
    Types of Output Data
    54
    
    Output Priority
    55
    
    Status Data
    55
  - Service Requests
    55
    
    The Serial Poll Register
    55
    
    The SRQ Mask
    55
  - Serial Poll Register
    55
  - Interface Messages
    56
    
    Address Messages
    56
    
    Addressed Commands
    56
    
    Universal Commands
    56
  - Talk-Only Mode
    56
- Timing Considerations
  57
- Example Program: Taking 10 Readings
  58
- Example Program: Taking Readings with Local Control
  59
- Example Programs: Using the IBM PC
  62
- Example Programs
  72
- DC Voltage Measurement
  75
  - Circuit Loading Error
    75
  - Input Bias Current Error
    75
- Introduction
  75
- Measurement Tutorial
  75
- Resistance Measurement
  76
  - 2-Wire Ohms
    76
  - Circuit Loading Error Calculation
    76
  - 4-Wire Ohms
    77
  - Applications of the Ohms Functions
    77
  - Measuring Input Bias Current Error
    77
    
    Testing Diodes
    78
- Testing Electrolytic Capacitors
  78
  - 2-Wire Ohms Measurement
    78
    
    Aprecision Current Source
    79
  - 4-Wire Ohms Measurement
    79
- Ac Voltage and Current Measurement
  80
- DC Current Measurement
  80
- Reducing Thermal Voltages
  80
- AC-Coupled AC Measurements
  81
  - Burden Voltage Error Calculation
    81
- Crest Factor
  81
- Waveform Comparison Chart
  82
- Bandwidth
  83
  - Typical Crest Factors for Various Waveforms
    83
  - Combined AC and DC Measurement
    83
- Combined AC and DC Measurements
  83
- Zero-Input VAC Error
  83
- Detailed Circuit Description
  85
  - DC Scaling
    85
  - VDC Scaling
    85
- Introduction
  85
- Overall Functional Description
  85
- Theory of Operation
  85
- DC Scaling (VDC and Rna DC)
  87
  - VDC Protection
    88
  - DC Scaling
    88
- Hold Configuration
  88
  - Analog Filter
    88
- Pre-Charge Configuration
  88
- Precision Voltage Reference
  88
- Settling Configuration
  88
- Tracwhold Circuit
  88
- Ohms Current Source
  89
- Ohms Protection
  89
- 2-Wire Ohms
  92
- Ohms Functions
  92
- Ohms Scaling
  94
- Display
  96
- Precision DAC
  96
- Keyboard
  97
  - Function and Range Control
    99
  - Calibration Correction
    99
  - Troubleshooting Modes
    99
  - Guard-Crossing Communication
    99
    
    Guard Crossing
    100
    
    Power Supply
    101
    
    Ieee-488 Interface (Option -05)
    102
    
    Out-Guard Microcomputer
    102
    
    Signal Conditioning
    102
    
    Frequency Response Trimming
    103
    
    IEEE488 Interface Power Supply
    103
    
    Ma AC Scaling
    103
    
    True Rms Ac (Option -09)
    103
    
    True RMS AC-To-DC Conversion
    103
    
    VAC Scaling
    103
- Maintenance
  107
  - Introduction
    107
  - Performance Test
    107
  - Diagnostic Self-Tests
    107
  - DC Voltage Test
    107
  - AC Voltage Test (Option -09 Only)
    109
  - Resistance Test
    110
  - DC Current Test
    111
  - AC Current Test (Option -09 Only)
    112
  - Calibration
    113
    
    Initial Procedure
    113
    
    Offset and Gain Calibration
    113
    
    High-Frequency Ac Calibration
    115
  - Advanced Features and Special Considerations
    116
  - Storing Variable Inputs
    116
    
    Erasing Calibration Memory
    117
    
    Verifying Cajjbration
    117
    
    Ac Calibration at Other Frequencies
    118
    
    Optimizing Use of the 5450A
    118
    
    Tolerance Check
    118
  - Remote Calibration
    119
    
    Remote Erasure
    121
    
    Example Calibration Program
    122
  - Disassembly Procedure
    122
  - Case Removal
    123
  - True RMS AC PCA Removal (Option -09)
    123
  - IEEE-488 Interface PCA Removal (Option -05 Only)
    123
  - Main PCA Removal
    123
  - Front Panel Disassembly
    128
  - Reassembly Procedure
    128
  - Internal Fuse Replacement
    130
  - External Trigger Polarity Seleci1On
    131
- EXTERNAL TRIGGER POLARITY SELECTION (Option -05 Only)
  131
- Initial Troubleshooting Procedure
  131
- Troubleshooting
  131
- Diagnostic Self-Tests
  135
- Self-Test Descriptions
  135
- Digital Controller Troubleshooting
  137
  - In-Guard Microcomputer System
    137
    
    In-Guard Microcomputer
    138
    
    Address Latch (U219)
    139
- External Program Memory (XU222)
  139
  - Calibration Memory (U220)
    139
  - Relay Buffer (U201)
    139
- 3-To-8 Chip Select Decoder (U208)
  140
- 8-Bit Digit Driver (U215)
  140
  - 3-To-8 Strobe Decoder (U213)
    140
- 8-Bit Digit Driver (U218)
  140
- 8-Bit Segment Driver (U217)
  140
- Display Control (U212)
  140
- Display System
  140
- Hex Inverter (U203)
  140
- Hex Inverter (U221)
  140
- Analog Control Signals
  141
- Keyboard Wiring
  141
- Quad or Gate ( ' 2 1 1)
  141
- Evaluating Dynamic Signals
  142
- Evaluating Static Signals
  142
- DC Scaling Troubleshooting
  144
- Ohms Current Source Troubleshooting
  145
- Power Supply Troubleshooting
  148
- IEEE-488 Interface Troubleshooting (Option -05)
  150
  - Service Position
    150
- Diagnostic Program
  151
- Service Position
  152
  - Major Problems
    152
  - More Obscure Problems
    153
- Guard Crossing Troubleshooting
  154
- Internal Cleaning
  154
- Cleaning after Soldering
  155
- List of Replaceable Parts
  157
- Introduction
  158
  - How to Obtain Parts
    158
- Manual Status Information
  158
- Newer Instruments
  158
- Service Centers
  158

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Fluke 8840A Manuals

Fluke 8840A Instruction Manual (181 pages)

Table of Contents

Fluke 8840A Instruction Manual (182 pages)

Table of Contents

Section 1

Section 2

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